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<h1>src/qvblockprogramming/qvguiblocks/qvhistogram.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- mode: C++ ; c-file-style: &quot;stroustrup&quot; -*- *****************************</span>
<a name="l00002"></a>00002 <span class="comment"> * Qwt Widget Library</span>
<a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 1997   Josef Wilgen</span>
<a name="l00004"></a>00004 <span class="comment"> * Copyright (C) 2002   Uwe Rathmann</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
<a name="l00007"></a>00007 <span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span>
<a name="l00008"></a>00008 <span class="comment"> *****************************************************************************/</span>
<a name="l00009"></a>00009 
<a name="l00010"></a>00010 <span class="preprocessor">#include &lt;qstring.h&gt;</span>
<a name="l00011"></a>00011 <span class="preprocessor">#include &lt;qpainter.h&gt;</span>
<a name="l00012"></a>00012 <span class="preprocessor">#include &lt;qwt_plot.h&gt;</span>
<a name="l00013"></a>00013 <span class="preprocessor">#include &lt;qwt_interval_data.h&gt;</span>
<a name="l00014"></a>00014 <span class="preprocessor">#include &lt;qwt_painter.h&gt;</span>
<a name="l00015"></a>00015 <span class="preprocessor">#include &lt;qwt_scale_map.h&gt;</span>
<a name="l00016"></a>00016 <span class="preprocessor">#include &quot;qvhistogram.h&quot;</span>
<a name="l00017"></a>00017 
<a name="l00018"></a>00018 <span class="preprocessor">#ifndef DOXYGEN_IGNORE_THIS</span>
<a name="l00019"></a>00019 <span class="preprocessor"></span><span class="keyword">class </span>QVHistogram::PrivateData
<a name="l00020"></a>00020 {
<a name="l00021"></a>00021 <span class="keyword">public</span>:
<a name="l00022"></a>00022     <span class="keywordtype">int</span> attributes;
<a name="l00023"></a>00023     QwtIntervalData data;
<a name="l00024"></a>00024     QColor color;
<a name="l00025"></a>00025     <span class="keywordtype">double</span> reference;
<a name="l00026"></a>00026 };
<a name="l00027"></a>00027 
<a name="l00028"></a>00028 
<a name="l00029"></a>00029 QVHistogram::QVHistogram(<span class="keyword">const</span> QwtText &amp;title):
<a name="l00030"></a>00030     QwtPlotItem(title)
<a name="l00031"></a>00031 {
<a name="l00032"></a>00032     <a class="code" href="classQVGUI.html#a73873873373076c825c28a86d8b19f58" title="initialice the QVGUI object.">init</a>();
<a name="l00033"></a>00033 }
<a name="l00034"></a>00034 
<a name="l00035"></a>00035 QVHistogram::QVHistogram(<span class="keyword">const</span> QString &amp;title):
<a name="l00036"></a>00036     QwtPlotItem(QwtText(title))
<a name="l00037"></a>00037 {
<a name="l00038"></a>00038     <a class="code" href="classQVGUI.html#a73873873373076c825c28a86d8b19f58" title="initialice the QVGUI object.">init</a>();
<a name="l00039"></a>00039 }
<a name="l00040"></a>00040 
<a name="l00041"></a>00041 QVHistogram::~QVHistogram()
<a name="l00042"></a>00042 {
<a name="l00043"></a>00043     <span class="keyword">delete</span> d_data;
<a name="l00044"></a>00044 }
<a name="l00045"></a>00045 
<a name="l00046"></a>00046 <span class="keywordtype">void</span> QVHistogram::init()
<a name="l00047"></a>00047 {
<a name="l00048"></a>00048     d_data = <span class="keyword">new</span> PrivateData();
<a name="l00049"></a>00049     d_data-&gt;reference = 0.0;
<a name="l00050"></a>00050     d_data-&gt;attributes = QVHistogram::Auto;
<a name="l00051"></a>00051 
<a name="l00052"></a>00052     setItemAttribute(QwtPlotItem::AutoScale, <span class="keyword">true</span>);
<a name="l00053"></a>00053     setItemAttribute(QwtPlotItem::Legend, <span class="keyword">true</span>);
<a name="l00054"></a>00054 
<a name="l00055"></a>00055     setZ(20.0);
<a name="l00056"></a>00056 }
<a name="l00057"></a>00057 
<a name="l00058"></a>00058 <span class="keywordtype">void</span> QVHistogram::setBaseline(<span class="keywordtype">double</span> reference)
<a name="l00059"></a>00059 {
<a name="l00060"></a>00060     <span class="keywordflow">if</span> ( d_data-&gt;reference != reference )
<a name="l00061"></a>00061     {
<a name="l00062"></a>00062         d_data-&gt;reference = reference;
<a name="l00063"></a>00063         itemChanged();
<a name="l00064"></a>00064     }
<a name="l00065"></a>00065 }
<a name="l00066"></a>00066 
<a name="l00067"></a>00067 <span class="keywordtype">double</span> QVHistogram::baseline()<span class="keyword"> const</span>
<a name="l00068"></a>00068 <span class="keyword"></span>{
<a name="l00069"></a>00069     <span class="keywordflow">return</span> d_data-&gt;reference;
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071 
<a name="l00072"></a>00072 <span class="keywordtype">void</span> QVHistogram::setData(<span class="keyword">const</span> QwtIntervalData &amp;data)
<a name="l00073"></a>00073 {
<a name="l00074"></a>00074     d_data-&gt;data = data;
<a name="l00075"></a>00075     itemChanged();
<a name="l00076"></a>00076 }
<a name="l00077"></a>00077 
<a name="l00078"></a>00078 <span class="keyword">const</span> QwtIntervalData &amp;QVHistogram::data()<span class="keyword"> const</span>
<a name="l00079"></a>00079 <span class="keyword"></span>{
<a name="l00080"></a>00080     <span class="keywordflow">return</span> d_data-&gt;data;
<a name="l00081"></a>00081 }
<a name="l00082"></a>00082 
<a name="l00083"></a>00083 <span class="keywordtype">void</span> QVHistogram::setColor(<span class="keyword">const</span> QColor &amp;color)
<a name="l00084"></a>00084 {
<a name="l00085"></a>00085     <span class="keywordflow">if</span> ( d_data-&gt;color != color )
<a name="l00086"></a>00086     {
<a name="l00087"></a>00087         d_data-&gt;color = color;
<a name="l00088"></a>00088         itemChanged();
<a name="l00089"></a>00089     }
<a name="l00090"></a>00090 }
<a name="l00091"></a>00091 
<a name="l00092"></a>00092 QColor QVHistogram::color()<span class="keyword"> const</span>
<a name="l00093"></a>00093 <span class="keyword"></span>{
<a name="l00094"></a>00094     <span class="keywordflow">return</span> d_data-&gt;color;
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096 
<a name="l00097"></a>00097 QwtDoubleRect QVHistogram::boundingRect()<span class="keyword"> const</span>
<a name="l00098"></a>00098 <span class="keyword"></span>{
<a name="l00099"></a>00099     QwtDoubleRect rect = d_data-&gt;data.boundingRect();
<a name="l00100"></a>00100     <span class="keywordflow">if</span> ( !rect.isValid() ) 
<a name="l00101"></a>00101         <span class="keywordflow">return</span> rect;
<a name="l00102"></a>00102 
<a name="l00103"></a>00103     <span class="keywordflow">if</span> ( d_data-&gt;attributes &amp; Xfy ) 
<a name="l00104"></a>00104     {
<a name="l00105"></a>00105         rect = QwtDoubleRect( rect.y(), rect.x(), 
<a name="l00106"></a>00106             rect.height(), rect.width() );
<a name="l00107"></a>00107 
<a name="l00108"></a>00108         <span class="keywordflow">if</span> ( rect.left() &gt; d_data-&gt;reference ) 
<a name="l00109"></a>00109             rect.setLeft( d_data-&gt;reference );
<a name="l00110"></a>00110         <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( rect.right() &lt; d_data-&gt;reference ) 
<a name="l00111"></a>00111             rect.setRight( d_data-&gt;reference );
<a name="l00112"></a>00112     } 
<a name="l00113"></a>00113     <span class="keywordflow">else</span> 
<a name="l00114"></a>00114     {
<a name="l00115"></a>00115         <span class="keywordflow">if</span> ( rect.bottom() &lt; d_data-&gt;reference ) 
<a name="l00116"></a>00116             rect.setBottom( d_data-&gt;reference );
<a name="l00117"></a>00117         <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( rect.top() &gt; d_data-&gt;reference ) 
<a name="l00118"></a>00118             rect.setTop( d_data-&gt;reference );
<a name="l00119"></a>00119     }
<a name="l00120"></a>00120 
<a name="l00121"></a>00121     <span class="keywordflow">return</span> rect;
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123 
<a name="l00124"></a>00124 
<a name="l00125"></a>00125 <span class="keywordtype">int</span> QVHistogram::rtti()<span class="keyword"> const</span>
<a name="l00126"></a>00126 <span class="keyword"></span>{
<a name="l00127"></a>00127     <span class="keywordflow">return</span> QwtPlotItem::Rtti_PlotHistogram;
<a name="l00128"></a>00128 }
<a name="l00129"></a>00129 
<a name="l00130"></a>00130 <span class="keywordtype">void</span> QVHistogram::setHistogramAttribute(HistogramAttribute attribute, <span class="keywordtype">bool</span> on)
<a name="l00131"></a>00131 {
<a name="l00132"></a>00132     <span class="keywordflow">if</span> ( <span class="keywordtype">bool</span>(d_data-&gt;attributes &amp; attribute) == on )
<a name="l00133"></a>00133         <span class="keywordflow">return</span>;
<a name="l00134"></a>00134 
<a name="l00135"></a>00135     <span class="keywordflow">if</span> ( on )
<a name="l00136"></a>00136         d_data-&gt;attributes |= attribute;
<a name="l00137"></a>00137     <span class="keywordflow">else</span>
<a name="l00138"></a>00138         d_data-&gt;attributes &amp;= ~attribute;
<a name="l00139"></a>00139 
<a name="l00140"></a>00140     itemChanged();
<a name="l00141"></a>00141 }
<a name="l00142"></a>00142 
<a name="l00143"></a>00143 <span class="keywordtype">bool</span> QVHistogram::testHistogramAttribute(HistogramAttribute attribute)<span class="keyword"> const</span>
<a name="l00144"></a>00144 <span class="keyword"></span>{
<a name="l00145"></a>00145     <span class="keywordflow">return</span> d_data-&gt;attributes &amp; attribute;
<a name="l00146"></a>00146 }
<a name="l00147"></a>00147 
<a name="l00148"></a>00148 <span class="keywordtype">void</span> QVHistogram::draw(QPainter *painter, <span class="keyword">const</span> QwtScaleMap &amp;xMap, 
<a name="l00149"></a>00149     <span class="keyword">const</span> QwtScaleMap &amp;yMap, <span class="keyword">const</span> QRect &amp;)<span class="keyword"> const</span>
<a name="l00150"></a>00150 <span class="keyword"></span>{
<a name="l00151"></a>00151     <span class="keyword">const</span> QwtIntervalData &amp;iData = d_data-&gt;data;
<a name="l00152"></a>00152 
<a name="l00153"></a>00153     painter-&gt;setPen(QPen(d_data-&gt;color));
<a name="l00154"></a>00154 
<a name="l00155"></a>00155     <span class="keyword">const</span> <span class="keywordtype">int</span> x0 = xMap.transform(baseline());
<a name="l00156"></a>00156     <span class="keyword">const</span> <span class="keywordtype">int</span> y0 = yMap.transform(baseline());
<a name="l00157"></a>00157 
<a name="l00158"></a>00158     <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i &lt; (int)iData.size(); i++ )
<a name="l00159"></a>00159     {
<a name="l00160"></a>00160         <span class="keywordflow">if</span> ( d_data-&gt;attributes &amp; QVHistogram::Xfy )
<a name="l00161"></a>00161         {
<a name="l00162"></a>00162             <span class="keyword">const</span> <span class="keywordtype">int</span> x2 = xMap.transform(iData.value(i));
<a name="l00163"></a>00163             <span class="keywordflow">if</span> ( x2 == x0 )
<a name="l00164"></a>00164                 <span class="keywordflow">continue</span>;
<a name="l00165"></a>00165 
<a name="l00166"></a>00166             <span class="keywordtype">int</span> y1 = yMap.transform( iData.interval(i).minValue());
<a name="l00167"></a>00167             <span class="keywordtype">int</span> y2 = yMap.transform( iData.interval(i).maxValue());
<a name="l00168"></a>00168             <span class="keywordflow">if</span> ( y1 &gt; y2 )
<a name="l00169"></a>00169                 qSwap(y1, y2);
<a name="l00170"></a>00170 
<a name="l00171"></a>00171             <span class="keywordflow">if</span> ( i &lt; (<span class="keywordtype">int</span>)iData.size() - 2 )
<a name="l00172"></a>00172             {
<a name="l00173"></a>00173                 <span class="keyword">const</span> <span class="keywordtype">int</span> yy1 = yMap.transform(iData.interval(i+1).minValue());
<a name="l00174"></a>00174                 <span class="keyword">const</span> <span class="keywordtype">int</span> yy2 = yMap.transform(iData.interval(i+1).maxValue());
<a name="l00175"></a>00175 
<a name="l00176"></a>00176                 <span class="keywordflow">if</span> ( y2 == qwtMin(yy1, yy2) )
<a name="l00177"></a>00177                 {
<a name="l00178"></a>00178                     <span class="keyword">const</span> <span class="keywordtype">int</span> xx2 = xMap.transform(
<a name="l00179"></a>00179                         iData.interval(i+1).minValue());
<a name="l00180"></a>00180                     <span class="keywordflow">if</span> ( xx2 != x0 &amp;&amp; ( (xx2 &lt; x0 &amp;&amp; x2 &lt; x0) ||
<a name="l00181"></a>00181                                           (xx2 &gt; x0 &amp;&amp; x2 &gt; x0) ) )
<a name="l00182"></a>00182                     {
<a name="l00183"></a>00183                        <span class="comment">// One pixel distance between neighboured bars</span>
<a name="l00184"></a>00184                        y2++;
<a name="l00185"></a>00185                     }
<a name="l00186"></a>00186                 }
<a name="l00187"></a>00187             }
<a name="l00188"></a>00188 
<a name="l00189"></a>00189             drawBar(painter, Qt::Horizontal,
<a name="l00190"></a>00190                 QRect(x0, y1, x2 - x0, y2 - y1));
<a name="l00191"></a>00191         }
<a name="l00192"></a>00192         <span class="keywordflow">else</span>
<a name="l00193"></a>00193         {
<a name="l00194"></a>00194             <span class="keyword">const</span> <span class="keywordtype">int</span> y2 = yMap.transform(iData.value(i));
<a name="l00195"></a>00195             <span class="keywordflow">if</span> ( y2 == y0 )
<a name="l00196"></a>00196                 <span class="keywordflow">continue</span>;
<a name="l00197"></a>00197 
<a name="l00198"></a>00198             <span class="keywordtype">int</span> x1 = xMap.transform(iData.interval(i).minValue());
<a name="l00199"></a>00199             <span class="keywordtype">int</span> x2 = xMap.transform(iData.interval(i).maxValue());
<a name="l00200"></a>00200             <span class="keywordflow">if</span> ( x1 &gt; x2 )
<a name="l00201"></a>00201                 qSwap(x1, x2);
<a name="l00202"></a>00202 
<a name="l00203"></a>00203             <span class="keywordflow">if</span> ( i &lt; (<span class="keywordtype">int</span>)iData.size() - 2 )
<a name="l00204"></a>00204             {
<a name="l00205"></a>00205                 <span class="keyword">const</span> <span class="keywordtype">int</span> xx1 = xMap.transform(iData.interval(i+1).minValue());
<a name="l00206"></a>00206                 <span class="keyword">const</span> <span class="keywordtype">int</span> xx2 = xMap.transform(iData.interval(i+1).maxValue());
<a name="l00207"></a>00207 
<a name="l00208"></a>00208                 <span class="keywordflow">if</span> ( x2 == qwtMin(xx1, xx2) )
<a name="l00209"></a>00209                 {
<a name="l00210"></a>00210                     <span class="keyword">const</span> <span class="keywordtype">int</span> yy2 = yMap.transform(iData.value(i+1));
<a name="l00211"></a>00211                     <span class="keywordflow">if</span> ( yy2 != y0 &amp;&amp; ( (yy2 &lt; y0 &amp;&amp; y2 &lt; y0) ||
<a name="l00212"></a>00212                                     (yy2 &gt; y0 &amp;&amp; y2 &gt; y0) ) )
<a name="l00213"></a>00213                     {
<a name="l00214"></a>00214                         <span class="comment">// One pixel distance between neighboured bars</span>
<a name="l00215"></a>00215                         x2--;
<a name="l00216"></a>00216                     }
<a name="l00217"></a>00217                 }
<a name="l00218"></a>00218             }
<a name="l00219"></a>00219             drawBar(painter, Qt::Vertical,
<a name="l00220"></a>00220                 QRect(x1, y0, x2 - x1, y2 - y0) );
<a name="l00221"></a>00221         }
<a name="l00222"></a>00222     }
<a name="l00223"></a>00223 }
<a name="l00224"></a>00224 
<a name="l00225"></a>00225 <span class="keywordtype">void</span> QVHistogram::drawBar(QPainter *painter,
<a name="l00226"></a>00226    Qt::Orientation, <span class="keyword">const</span> QRect&amp; rect)<span class="keyword"> const</span>
<a name="l00227"></a>00227 <span class="keyword"></span>{
<a name="l00228"></a>00228    painter-&gt;save();
<a name="l00229"></a>00229 
<a name="l00230"></a>00230    <span class="keyword">const</span> QColor color(painter-&gt;pen().color());
<a name="l00231"></a>00231 <span class="preprocessor">#if QT_VERSION &gt;= 0x040000</span>
<a name="l00232"></a>00232 <span class="preprocessor"></span>   <span class="keyword">const</span> QRect r = rect.normalized();
<a name="l00233"></a>00233 <span class="preprocessor">#else</span>
<a name="l00234"></a>00234 <span class="preprocessor"></span>   <span class="keyword">const</span> QRect r = rect.normalize();
<a name="l00235"></a>00235 <span class="preprocessor">#endif</span>
<a name="l00236"></a>00236 <span class="preprocessor"></span>
<a name="l00237"></a>00237    <span class="keyword">const</span> <span class="keywordtype">int</span> factor = 125;
<a name="l00238"></a>00238    <span class="keyword">const</span> QColor light(color.light(factor));
<a name="l00239"></a>00239    <span class="keyword">const</span> QColor dark(color.dark(factor));
<a name="l00240"></a>00240 
<a name="l00241"></a>00241    painter-&gt;setBrush(color);
<a name="l00242"></a>00242    painter-&gt;setPen(Qt::NoPen);
<a name="l00243"></a>00243    QwtPainter::drawRect(painter, r.x() + 1, r.y() + 1,
<a name="l00244"></a>00244       r.width() - 2, r.height() - 2);
<a name="l00245"></a>00245    painter-&gt;setBrush(Qt::NoBrush);
<a name="l00246"></a>00246 
<a name="l00247"></a>00247    painter-&gt;setPen(QPen(light, 2));
<a name="l00248"></a>00248 <span class="preprocessor">#if QT_VERSION &gt;= 0x040000</span>
<a name="l00249"></a>00249 <span class="preprocessor"></span>   QwtPainter::drawLine(painter,
<a name="l00250"></a>00250       r.left() + 1, r.top() + 2, r.right() + 1, r.top() + 2);
<a name="l00251"></a>00251 <span class="preprocessor">#else</span>
<a name="l00252"></a>00252 <span class="preprocessor"></span>   QwtPainter::drawLine(painter,
<a name="l00253"></a>00253       r.left(), r.top() + 2, r.right() + 1, r.top() + 2);
<a name="l00254"></a>00254 <span class="preprocessor">#endif</span>
<a name="l00255"></a>00255 <span class="preprocessor"></span>
<a name="l00256"></a>00256    painter-&gt;setPen(QPen(dark, 2));
<a name="l00257"></a>00257 <span class="preprocessor">#if QT_VERSION &gt;= 0x040000</span>
<a name="l00258"></a>00258 <span class="preprocessor"></span>   QwtPainter::drawLine(painter, 
<a name="l00259"></a>00259       r.left() + 1, r.bottom(), r.right() + 1, r.bottom());
<a name="l00260"></a>00260 <span class="preprocessor">#else</span>
<a name="l00261"></a>00261 <span class="preprocessor"></span>   QwtPainter::drawLine(painter, 
<a name="l00262"></a>00262       r.left(), r.bottom(), r.right() + 1, r.bottom());
<a name="l00263"></a>00263 <span class="preprocessor">#endif</span>
<a name="l00264"></a>00264 <span class="preprocessor"></span>
<a name="l00265"></a>00265    painter-&gt;setPen(QPen(light, 1));
<a name="l00266"></a>00266 
<a name="l00267"></a>00267 <span class="preprocessor">#if QT_VERSION &gt;= 0x040000</span>
<a name="l00268"></a>00268 <span class="preprocessor"></span>   QwtPainter::drawLine(painter, 
<a name="l00269"></a>00269       r.left(), r.top() + 1, r.left(), r.bottom());
<a name="l00270"></a>00270    QwtPainter::drawLine(painter,
<a name="l00271"></a>00271       r.left() + 1, r.top() + 2, r.left() + 1, r.bottom() - 1);
<a name="l00272"></a>00272 <span class="preprocessor">#else</span>
<a name="l00273"></a>00273 <span class="preprocessor"></span>   QwtPainter::drawLine(painter, 
<a name="l00274"></a>00274       r.left(), r.top() + 1, r.left(), r.bottom() + 1);
<a name="l00275"></a>00275    QwtPainter::drawLine(painter,
<a name="l00276"></a>00276       r.left() + 1, r.top() + 2, r.left() + 1, r.bottom());
<a name="l00277"></a>00277 <span class="preprocessor">#endif</span>
<a name="l00278"></a>00278 <span class="preprocessor"></span>
<a name="l00279"></a>00279    painter-&gt;setPen(QPen(dark, 1));
<a name="l00280"></a>00280 
<a name="l00281"></a>00281 <span class="preprocessor">#if QT_VERSION &gt;= 0x040000</span>
<a name="l00282"></a>00282 <span class="preprocessor"></span>   QwtPainter::drawLine(painter, 
<a name="l00283"></a>00283       r.right() + 1, r.top() + 1, r.right() + 1, r.bottom());
<a name="l00284"></a>00284    QwtPainter::drawLine(painter, 
<a name="l00285"></a>00285       r.right(), r.top() + 2, r.right(), r.bottom() - 1);
<a name="l00286"></a>00286 <span class="preprocessor">#else</span>
<a name="l00287"></a>00287 <span class="preprocessor"></span>   QwtPainter::drawLine(painter, 
<a name="l00288"></a>00288       r.right() + 1, r.top() + 1, r.right() + 1, r.bottom() + 1);
<a name="l00289"></a>00289    QwtPainter::drawLine(painter, 
<a name="l00290"></a>00290       r.right(), r.top() + 2, r.right(), r.bottom());
<a name="l00291"></a>00291 <span class="preprocessor">#endif</span>
<a name="l00292"></a>00292 <span class="preprocessor"></span>
<a name="l00293"></a>00293    painter-&gt;restore();
<a name="l00294"></a>00294 }
<a name="l00295"></a>00295 <span class="preprocessor">#endif</span>
<a name="l00296"></a>00296 <span class="preprocessor"></span>
</pre></div></div>
</td></tr></table>

<br /><hr><br />
<center><a href="http://perception.inf.um.es/QVision">QVision framework</a>.
<a href="http://perception.inf.um.es">PARP research group</a>.
Copyright &copy; 2007, 2008, 2009, 2010, 2011.</center>
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